No, David hasn't grown facial hair and turned into Tasmanian Mountain Man. I have read that 'Old Man's Beard' is the common name of the pale green lichen that grows prolifically on top of fence posts in our area, and also hangs off the branches of many trees. It often looks like the fence post has hair. Below is an example from our fence. Note frost in background!
Australia's other red centre hits the road
15 hours ago